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I have found this , but again due to my begginer skill at javascript have no clue

Referencing Magic - Shortcuts for jQuery

If you don't like typing the full "jQuery" all the time, there are some alternative shortcuts:

* Reassign jQuery to another shortcut
o var $j = jQuery;
o (This might be the best approach if you wish to use different libraries)
* Use the following technique, which allows you to use $ inside of a block of code without permanently overwriting $:
o (function($) { /* some code that uses $ */ })(jQuery)
o Note: If you use this technique, you will not be able to use Prototype methods inside this capsuled function that expect $ to be Prototype's $, so you're making a choice to use only jQuery in that block.
* Use the argument to the jQuery(document).ready(function($) {})